KYC details are nothing but information about yourself like PAN,Bank Account, Aadhaar, Passport,Driving License,Ration Card,National Population Register,Election card etc.,
And you can also update them directly in UAN like shown in the below posts
- How to update Aadhaar in UAN?
- Updating Bank Details in UAN
- Updating PAN Card details in UAN
- How to update Passport details in UAN